SIMBAD references

2025RNAAS...9..194B - Research Notes of the AAS, 9, 194 (2025/July-0)

Palomar and Apache Point Spectrophotometry of Interstellar Comet 3I/ATLAS.

BELYAKOV M., FREMLING C., GRAHAM M.J., BOLIN B.T., KILIC M., JEWETT G., LISSE C.M., INGEBRETSEN C., DAVIS M.R. and WONG I.

Abstract (from CDS):

On 2025 July 1st the third interstellar object, 3I/ATLAS or C/2025 N1 (ATLAS), was discovered, with an eccentricity of e = 6.15 ± 0.01 and perihelion of q = 1.357 ± 0.001 au. We report our initial visible to near-infrared (420-1000 nm) spectrophotometry of 3I/ATLAS using both the Palomar 200 inch telescope and Apache Point Observatory. We measure 3I/ATLAS to have a red spectral slope of 19%/100 nm in the 420-700 nm range, and a more neutral 6%/100 nm slope over 700-1000 nm. We detect no notable emission features such as from C2.

Abstract Copyright: © 2025. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Interstellar objects - Spectroscopy

Simbad objects: 1

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